Cleartext storage of sensitive information in Mozilla Thunderbird - CVE-2020-6794

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Main Vulnerability Database Vulnerabilities #VU25127

Cleartext storage of sensitive information in Mozilla Thunderbird - CVE-2020-6794

Published: February 11, 2020


Vulnerability identifier: #VU25127
CSH Severity: Low
CVSS v4: 4.8 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2020-6794
CWE-ID: CWE-312
Exploitation vector: Local access
Exploit availability: No public exploit available

Vulnerability details

The vulnerability allows a local user to gain access to sensitive information.

The vulnerability exists due to an error password management functionality when working with master password that was updated after Thunderbird 60 release. The old password is still available unencrypted on the system, as Thunderbird did not delete the old password file after update.


Affected software

Mozilla Thunderbird
Arch Linux
Gentoo Linux
CentOS
Red Hat Enterprise Linux for IBM z Systems
Red Hat Enterprise Linux Workstation
Red Hat Enterprise Linux Server
Red Hat Enterprise Linux Desktop
Red Hat Enterprise Linux for x86_64
Slackware Linux
Opensuse
Red Hat Enterprise Linux Server for x86_64 - Update Services for SAP Solutions
thunderbird (Debian package)
thunderbird (Ubuntu package)
thunderbird (Alpine package)

How to mitigate CVE-2020-6794

Install updates from vendor's website.

Mozilla Thunderbird - update to 68.5.0
thunderbird (Debian package) - addressed in versions 1:68.5.0-1~deb9u1, 1:68.5.0-1~deb10u1
thunderbird (Ubuntu package) - update to 1:68.7.0+build1-0ubuntu0.16.04.2
thunderbird (Alpine package) - update to 68.5.0-r0

External References

Related Security Bulletins